Crown-shaped fixture set

ABSTRACT

A crown-shaped fixture set for a tubular fixture device is described in the present invention, which comprises a pair of crown-shaped fixtures. The crown-shaped fixture is a disc with a crown portion. The center of the disc has an aperture. The crown portion of the fixture is shaped like a conoid. The bottom of the crown portion forms a plurality of positioning slots. Pluralities of tangential grooves corresponding to positioning slots are formed on the crown portion. Thus, the crown portion is capable of positioning and fixing paper tubes of various bore sizes, so that the paper tube can be reused and the contact area between the paper tube and the crown portion can be increased and stabilizes the rotation movement of the paper tube.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a fixture, or more particularly, to acrown-shaped fixture set for a paper-tube fixture device.

2. Description of the Related Art

The conventional spinning machine comprises a rotary paper-tube fixturedevice to fix a paper tube, wherein said paper tube is driven by arotary engine at high speed to roll the yarn around said paper tube.

FIG. 1 is a side view of a conventional rotary paper-tube fixturedevice. A conventional rotary paper-tube fixture device includes arotary engine (not shown), a master axis 1, a slave axis 2 and a fixtureset, wherein the fixture set further comprises a pair of fixtures 3which are mounted respectively on the master axis 1 and the slave axis2. The forgoing master axis 1 is driven by the rotary engine. The slaveaxis 2 of the conventional rotary paper-tube fixture device works incombination with the master axis 1 so as to position and fix a papertube 30 between said pair of fixtures 3. When the rotary engine isturned on, the master axis 1 is propelled to force the fixture and thepaper tube 30 to generate friction so as to position and fix the papertube 30. Then the movement of the master axis 1 causes the paper tube 30to rotate at high speed so as to roll the yarn around the paper tube 30.

FIG. 2 shows a conventional fixture. The conventional fixture 3 is inthe shape of a disc and features three protruding points 5 which areevenly scattered on the circular ring 4 along the edge the fixture 3.Height difference is disposed between the protruding points 5 and thecircular ring 4 so as to engage a paper tube. Conventionally, a fixtureon a master axis 1 will press against a paper tube 30 with only threeprotruding points 5 in touch with the paper tube 30, and then causes afixture on a slave axis 2 to rotate in sync. The limited contact areabetween the paper tube 30 and the three protruding points 5 on thefixture 3 generates limited friction in-between. Besides, the imbalancearising out of external force or deformation of the paper tube 30 maymake the paper tube 30 escape from its normal movement path. Especially,at the onset of rotation when the inertia is minimal and the bore sizeof the paper tube 30 is not expanded, the occurrence of deviation fromthe intended movement path is common. Therefore, the escaping paper tube30 at high speed will damage the fixture 3 seriously.

Furthermore, erosion of the protruding points 5 caused by the fixture 3may easily induce the deviation and the erosion of the fixture on theslave axis. The increase of pressure against the fixture though reducesthe deviation of the fixture from the slave axis, may result in thedisengagement and deformation of the fixture on the slave axis andinfluence the efficiency of the fixtures. In addition, conventionalfixtures with various diameters shall be provided to fit into papertubes with different bore sizes, which increases the manufacturing cost.Extra labor is required to change the fixtures on the master and slaveaxes for paper tubes with different diameters. Furthermore, closecontact is required between the outer diameter of the fixture and theinner diameter of the slave axis. Otherwise, vibration and centrifugalmovement may occur and disturb the balanced inertia.

The disadvantages in application and operation of the conventionalfixtures with three protruding points include the axis deviation of thefixture set resulting from problematic fixtures, little contact areabetween the paper tube and the fixture, serious erosion of the fixturescaused by the paper tube leading to shorter life cycle of the fixtures,and limited applicability and high manufacturing cost of the fixtures.

SUMMARY OF THE INVENTION

A plurality of convex clips on the present invention of a crown-shapedfixture set is designed based upon the principle of clip connection. Thedeployment of convex clips along the crown portion increases the contactarea between the fixtures and paper tubes so as to improve theefficiency and solve the abovementioned problems.

One object of the present invention is to provide a crown-shaped fixtureset for a paper-tube fixture device.

Another object of the present invention is to provide a fixture for apaper-tube fixture device, featuring a crown portion which accommodatesa plurality of convex clips to fit into paper tubes with variousdiameters and to quickly position the paper tubes.

The other object of the present invention is to provide a fixture set toposition and fix paper tubes, which features a crown portion with aplurality of convex clips to increase the contact area.

The present invention of the crown-shaped fixture set includes a fixturewhich comprises a disc and a crown portion both cast in one mold. Saidcrown portion is disposed on one side of the disc and the disc forms aring along the circumference thereof. Pluralities positioning slots aredisposed on said ring of the disc. Pluralities of grooves are disposedalong the circumference of the crown portion and along the surface ofthe crown portion are convex clips. Each two adjacent convex clipsfurther define a groove which then corresponds to said positioning sloton the disc. Said fixture has an aperture in the middle.

In one embodiment of the present invention, a rotary fixture device isprovided, which includes an engine, a master axis, a slave axis and acrown-shaped fixture set. Said crown-shaped fixture set furthercomprises a pair of fixtures which are mounted on the master and slaveaxes respectively. Each said fixture comprises a disc and a crownportion in one mold. Said crown portion is disposed on one side of thedisc and the disc forms a ring along the circumference thereof.Pluralities positioning slots are disposed on said ring of the disc.Pluralities of grooves are disposed along the circumference of the crownportion and along the surface of the crown portion are convex clips.Each two adjacent convex clips further define a groove which thencorresponds to said positioning slot on the disc. Said fixture has anaperture in the middle.

Two blind vias are disposed separately at two ends of said aperture onthe fixture so as to easily fix paper tubes thereon.

Further, said convex clips along the circumference of said crown portioncan fit into paper tubes of various diameters and increase the contactarea so as to improve the effect of contact.

It is preferable that 8 to 20 convex clips are disposed along thecircumference of said crown portion, which further define 8 to 20positioning slots.

It is preferred that 18 convex clips are formed along said crown portionwith 18 positioning slots defined thereby.

According to the present invention of a crown-shaped fixture set, thecrown-shaped design can increase the contact area between the fixturesand paper tubes so as to improve the effect of contact and reduceabrasion damage, deviation of axes, escape of paper tubes etc. Inaddition, the convex clips along the crown portion can fit into papertubes of various bore sizes so as to achieve the eco-friendly effects,such as no need to replace fixtures, quick positioning, reduction ofmanufacturing cost of fixtures and recycling of the paper tubes.

These and other features and objects of the present invention willbecome better understood with reference to the following description,appended claims and accompanying drawings that are provided only forfurther elaboration without limiting or restricting the presentinvention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side view of a conventional rotary paper-tube fixturedevice.

FIG. 2 is a 3D drawing of a conventional fixture.

FIG. 3A is a side view of the present invention, showing acrowned-shaped fixture.

FIG. 3B is a 3D drawing of the present invention, showing the front faceof the crowned-shaped fixture.

FIG. 3C is a perspective view from below, showing the present inventionof the crowned-shaped fixture.

FIG. 3D is a 3D drawing of the present invention, showing the rear faceof crowned-shaped fixture.

FIG. 4 is a side view, showing the present invention of the crown-shapedfixture set mounted on a rotary paper-tube fixture device.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The following is a detailed description of the best presently knownmodes of carrying out the inventions. This description is not to betaken in a limiting sense, but is made merely for the purpose ofillustrating the general principles of the inventions.

FIGS. 3A to 3D illustrate the present invention of a crown-shapedfixture 20 at various angles. According to a preferable embodiment ofthe present invention, the crown-shaped fixture 20 comprises a disc 29and a crown portion 28 at one mold. Said crown portion 28 is disposed atone side of said disc 29 and the disc 29 forms a ring. Along the ringhas pluralities of positioning slots 22. A plurality of convex clips 27are disposed along the circumference of said crown potion 28, with eachtwo convex clips 27 defining an arc groove 23 which corresponds to saidpositioning slot 22 upon the disc 29. In addition, an aperture 21 isdisposed upon said crown-shaped fixture 20.

Said aperture 21 has a top blind via 24 and a bottom blind via 25 at theupper and lower surface of said crown-shaped fixture 20 respectively sothat a master axis 1 or a slave axis 2 may be engaged and fix saidcrown-shaped fixture 20 thereon by means of a male or female screw.Besides, an axis-fixing ring 26 is disposed along the circumference ofsaid aperture 21 at the side where said bottom blind via 25 is deployedso that a user may easily position and fix the crown-shaped fixture 20onto the axis.

According to a preferable embodiment of the present invention, saidcrown portion 28 of the crown-shaped fixture 20 features 8 to 20 convexclips 27, and said convex clips 27 define 8 to 20 arc grooves 23 whichfurther correspond to 8 to 20 positioning slots 22. According to anotherpreferable embodiment, 8 to 18 convex clips 27 are formed along thecrown portion 28 of the crown-shaped fixture 20, with adjacent convexclips 27 defining 8 to 18 arc grooves 23 which correspond to 8 to 18positioning slots 22.

According to forgoing embodiments of the present invention, convex clips27 of said crown portion 28 operates based on the principle of clipconnection and can fit into paper tubes 30 of various diameters.Therefore, the contact area between said crown-shaped fixture 20 andsaid paper tube 30 is larger than that between the conventional fixtureand said paper tube 30 so that the effect of contact is improved andfriction is increased to resist the revolution and centrifugal force ofthe paper tube. Further, the deviation and disengagement of the fixtureat high rotation speed resulting from the insufficient rigidity of thedeformed and broken fixture may be prevented.

In addition, said convex clips 27 along said crown portion 28 assistquick positioning. That is, said convex clips 27 may limit the movementof the fixture and quickly position said fixture within a short periodof time so as to balance the rotation inertia.

FIG. 4 is a side view, showing the present invention of the crown-shapedfixture set mounted on a rotary paper-tube fixture device. The presentinvention provides a crown-shaped fixture set, comprising a pair ofcrown-shaped fixtures 20, for a rotary paper-tube fixture device. Saidrotary paper-tube fixture device comprises a rotary slave axis 2 and amaster axis 1 which is driven by an engine. Said pair of crown-shapedfixtures 20 are mounted respectively on said master axis 1 and saidslave axis 2 so as to form a master fixture and a slave fixture. Due tothe convex clips 27 along the crown portion 28 of said crown-shapedfixtures 20, paper tubes 30 of various bore sizes can fit into saidcrown-shaped fixtures 20. Reused paper tubes 30 will expand graduallydue to the tight fit between the crown portion and the paper tubes,while the maximal extent of expansion occurs at the portion proximal tothe positioning slots 22 on the disc 29.

The present invention of the crown-shaped fixture set can be applied toa rotary fixture device. The convex clips employed on the crown portionof the present invention is tangent to the surface of the paper tube soas to solve the problems encountered by conventional fixture whichemploys concentric protruding elements to position said paper tube. Theconvex clips 27 of the present invention facilitate the introduction ofthe paper tube to the fixture, and the crown portion functions tostabilize the rotation inertia, which in all achieves the effect ofquick positioning and applicability to paper tubes of various boresizes. According to the most preferable embodiment of the presentinvention, the 18 positioning slots 22 can prevent the disengagement ofthe paper tubes efficiently.

Although the present invention has been described in considerable detailwith reference to certain preferred embodiments thereof, those skilledin the art can easily understand that all kinds of alterations andchanges can be made within the spirit and scope of the appended claims.Therefore, the spirit and scope of the appended claims should not belimited to the description of the preferred embodiments containedherein.

1. A crown-shaped fixture set, comprising at least one fixture with anaperture which comprises a disc and a conical crown portion in one mold;wherein said conical crown portion with said aperture is disposed on oneside of said disc and accommodates a plurality of grooves along thecircumference thereof and a plurality of convex clips on the ridgelinebetween each two said grooves; and wherein a plurality of positioningslots are disposed on said disc and correspond to said grooves.
 2. Thecrown-shaped fixture set as in claim 1, wherein said conical crownportion accommodates 18 convex clips.
 3. The crown-shaped fixture set asin claim 2, wherein said 18 convex clips define 18 grooves.
 4. Thecrown-shaped fixture set as in claim 3, wherein said 18 groovescorrespond to 18 positioning slots.
 5. The crown-shaped fixture set asin claim 1, wherein the number of said convex clips is between 8 and 20.6. The crown-shaped fixture set as in claim 1, wherein two blind viasare disposed at two ends of said aperture, namely the bottom surface ofsaid disc and the top surface of said conical crown portion.
 7. Thecrown-shaped fixture set as in claim 6, wherein said aperture issurrounded by a concentric ring.
 8. The crown-shaped fixture set as inclaim 1, wherein said grooves are connected one after the other.